2011 INFINITI QX56 turn signal

B2420 CLOSE SWITCHDLK-95
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
DLK
N
O P
B2420 CLOSE SWITCH
DTC LogicINFOID:0000000006225894
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-95, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225895
1.CHECK CLOSE SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “CLOSE SW” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK AUTOMATIC BACK DOOR CONTROL MODULE OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly connector.
3. Check voltage between back door lock assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK CLOSE SWITCH CIRCUIT
1. Disconnect automatic back door control module connector.
2. Check continuity between automatic back door control module harness connector and back door lock
assembly harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2420 CLOSE SW When the automatic back door control unit detects
any of the following conditions
 The change of close switch cannot be detected
for 3 second or more after starting the closure
close output for the 3rd time in a row  Close switch
 Harness or connectors
(Close switch circuit is open or
shorted)
 Automatic back door control mod- ule
Monitor item Condition Status
CLOSE SW Back door Open/Half latch OFF
Fully closed ON
(+)
(–)Voltag e
(Approx.)
Back door lock assembly
Connector Terminal D157 5 Ground Battery voltage
Revision: 2010 May2011 QX56

DLK-98
< DTC/CIRCUIT DIAGNOSIS >
B2422 BACK DOOR STATE
B2422 BACK DOOR STATE
DTC LogicINFOID:0000000006225899
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-98, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225900
1.REPLACE AUTOMATIC BACK DOOR CONTROL MODULE
When DTC [B2422] is detected, replac e automatic back door control module.
>> Replace automatic back door control module. Refer to DLK-262, "
Removal and Installation".
DTCCONSULT-III display
description DTC detecting condition Possible cause
B2422 BACK DOOR STATE When the automatic back door control unit detects
back door position malfunction according to the
pulse signal  Back door mechanism
 Automatic back door control mod-
ule
Revision: 2010 May2011 QX56

DLK-100
< DTC/CIRCUIT DIAGNOSIS >
B2424 CLOSURE CONDITION
B2424 CLOSURE CONDITION
DTC LogicINFOID:0000000006225903
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-100, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225904
1.CHECK OPEN/CLOSE SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “CLOSE SW”, “OPEN SW” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK AUTOMATIC BACK DOOR CONTROL MODULE OUTPUT
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly connector.
3. Check voltage between back door lock assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK OPEN/CLOSE SWITCH CIRCUIT
1. Disconnect automatic back door control module connector.
DTC CONSULT-III display de-
scription DTC detecting condition Possible cause
B2424 CLSR CONDITION When the following conditions are detected after
OPEN/CLOSE operation of the back door closure
motor
 Open switch and close switch are ON  Harness or connector
(Open switch or close switch
circuit is open or shorted)
 Back door lock assembly
Monitor item Condition Status
OPEN SW Back doorHalf latch/fully closed OFF
Open ON
CLOSE SW Open/half latch OFF
Fully closed ON
(+)
(–)Vo l ta g e
(Approx.)
Back door lock assembly
Connector Terminal
D157 4
Ground Battery voltage
5
Revision: 2010 May2011 QX56

DLK-104
< DTC/CIRCUIT DIAGNOSIS >
B2621 INSIDE ANTENNA
B2621 INSIDE ANTENNA
DTC LogicINFOID:0000000006225908
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “INTELLIGE NT KEY” of “BCM” using CONSULT-III.
2. Select “INSIDE ANT DIAGNOSI S” in “WORK SUPPORT” mode.
3. Perform inside key antenna (“INSIDE ANT DIAG NOSIS”) on “WORK SUPPORT” of “INTELLIGENT
KEY”.
4. Check BCM for DTC.
Is inside key antenna DTC detected?
YES >> Refer to DLK-104, "Diagnosis Procedure".
NO >> Inside key antenna (instrument center) is OK.
Diagnosis ProcedureINFOID:0000000006225909
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and inside key antenna (instrument center) connector.
DTCCONSULT-III display
description DTC detecting condition Possible cause
B2621 INSIDE ANTENNA An excessive high or low voltage from inside anten-
na (instrument center) is sent to BCM  Inside key antenna (instrument
center)
 Between BCM ™Inside key anten-
na (instrument center)
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Instrument center M71 84, 85 Ground When Intelligent Key is in the
antenna detection area
When Intelligent Key is not in
the antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

DLK-106
< DTC/CIRCUIT DIAGNOSIS >
B2622 INSIDE ANTENNA
B2622 INSIDE ANTENNA
DTC LogicINFOID:0000000006225910
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “INTELLIGE NT KEY” of “BCM” using CONSULT-III.
2. Select “INSIDE ANT DIAGNOSI S” in “WORK SUPPORT” mode.
3. Perform inside key antenna (“INSIDE ANT DIAG NOSIS”) on “WORK SUPPORT” of “INTELLIGENT
KEY”.
4. Check BCM for DTC.
Is inside key antenna DTC detected?
YES >> Refer to DLK-106, "Diagnosis Procedure".
NO >> Inside key antenna (console) is OK.
Diagnosis ProcedureINFOID:0000000006225911
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and inside key antenna (console) connector.
2. Check continuity between BCM harness connector and inside key antenna (console) harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2622 INSIDE ANTENNA An excessive high or low voltage from inside anten-
na (console) is sent to BCM  Inside key antenna (console)
 Between BCM
™Inside key anten-
na (console)
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Console M71 86, 87 Ground When Intelligent Key is in the an-
tenna detection area
When Intelligent Key is not in the
antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

DLK-108
< DTC/CIRCUIT DIAGNOSIS >
B2623 INSIDE ANTENNA
B2623 INSIDE ANTENNA
DTC LogicINFOID:0000000006225912
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Select “INTELLIGE NT KEY” of “BCM” using CONSULT-III.
2. Select “INSIDE ANT DIAGNOSI S” in “WORK SUPPORT” mode.
3. Perform inside key antenna (“INSIDE ANT DIAG NOSIS”) on “WORK SUPPORT” of “INTELLIGENT
KEY”.
4. Check BCM for DTC.
Is inside key antenna DTC detected?
YES >> Refer to DLK-108, "Diagnosis Procedure".
NO >> Inside key antenna (luggage room) is OK.
Diagnosis ProcedureINFOID:0000000006225913
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and inside key antenna (luggage room) connector.
2. Check continuity between BCM harness connector and inside key antenna (luggage room) harness con- nector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2622 INSIDE ANTENNA An excessive high or low voltage from inside anten-
na (luggage room) is sent to BCM  Inside key antenna (luggage room)
 Between BCM
™Inside key anten-
na (luggage room)
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Luggage
Room M71 88, 89 Ground When Intelligent Key is in the an-
tenna detection area
When Intelligent Key is not in the
antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

DLK-110
< DTC/CIRCUIT DIAGNOSIS >
B2626 OUTSIDE ANTENNA
B2626 OUTSIDE ANTENNA
DTC LogicINFOID:0000000006225914
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” m ode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Refer to DLK-108, "Diagnosis Procedure".
NO >> Outside key antenna (driver side) is OK.
Diagnosis ProcedureINFOID:0000000006225915
1.CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK OUTSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and outside key antenna (driver side) connector.
2. Check continuity between BCM harness connector and outside key antenna (driver side) harness connec- tor.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2626 OUTSIDE ANTENNA An excessive high or low voltage from outside key
antenna (driver side
) is sent to BCM  Outside key antenna (driver side)
 Between BCM
™Outside key an-
tenna (driver side)
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Driver side M71 78, 79 Ground When Intelligent Key is in the
antenna detection area
When Intelligent Key is not in
the antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56

DLK-112
< DTC/CIRCUIT DIAGNOSIS >
B2627 OUTSIDE ANTENNA
B2627 OUTSIDE ANTENNA
DTC LogicINFOID:0000000006225916
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” m ode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Refer to DLK-108, "Diagnosis Procedure".
NO >> Outside key antenna (passenger side) is OK.
Diagnosis ProcedureINFOID:0000000006225917
1.CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using oscilloscope.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> GO TO 2.
2.CHECK OUTSIDE KEY ANTENNA CIRCUIT
1. Disconnect BCM connector and outside key antenna (passenger side) connector.
2. Check continuity between BCM harness connector and outside key antenna (passenger side) harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2627 OUTSIDE ANTENNA An excessive high or low voltage from outside key
antenna (passenger side) is sent to BCM  Outside key antenna (passenger
side)
 Between BCM ™Outside key an-
tenna (passenger side)
(+)
(–) Condition Signal
(Reference value)
BCM
Connector Terminal
Passenger
side M71 80, 81 Ground When Intelligent Key is in the an-
tenna detection area
When Intelligent Key is not in the
antenna detection area
JMKIA3839GB
JMKIA3838GB
Revision: 2010 May2011 QX56